Sewing-machine stitch



c. PARHAM.

Sewing Machine Stitch. No. 46.133. Patented Jany 31,1865.

messes.

N. PETERS. mummm n hu. Washinglon, D. C.

UNITED STATES PATENT @FFICE.

CHARLES PARHAM, OF PHILADELPHIA, PENNSYLVANIA.

SEWING-MACHINE STITCH.

Specification forming part of Letters P-atent No. 46,133, dated January31, 1865.

To all whom it may concern:

Be it known that I, OHARLESIARHAMT, of the city and county ofPhiladelphia, and State of Pennsylvania, have invented or discovered anew and useful Improvement in a Sewing- Machine Stitch; and I do herebydeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawing, marked Figure 1,making a part of this specification, and which represents on an enlargedand spread-out scale the manner of interlocking the threads to form whatmay be denominated a button hole stitch.

My invention consists in making the stitch in question of two threads,but with a triple lock-that is to say, by forming a loop in one of thethreads, and by passing a second loop of that same thread through thefirst loop, and then passing the second thread through the second loopand drawing the slack of the threads tight up in the cloth or othermaterial, which has been so placed and moved as to receive thesestitches in regular line and succession-as will be explained inconnection with the drawing.

The thread a (in red) may represent the needle-thread ofasewing-maohine, and the thread I) (in blue) may represent theshuttle-thread thereof. A loop, 1, is first formed in the thread a, anda second loop, 2, of the same thread is made and passed through the loop1, and then the thread bis passed through the loop 2, and the slack ot'the threads is then drawn up,

- which interlockin gs in succession, as the cloth is movedautomatically to properly receive them, form a series of stitches, suchas shown at c, peculiarly suitable for button-hole work.

By reference to a patent granted to me on the 26th of April, 1864, amechanism for making this peculiar stitch will there be found describedand represented. A hook or looper is used to catch and retain the firstloop of the needle-thread until a second loop of the same thread ispassed through its first loop, and then the shuttle, passing its threadthrough the second loop of the needle-thread, forms a lock, which, whendrawn up tight, makes the stitch in question. The material, in additionto its usual forward feed, is moved laterally at proper intervals, so asto allow the needle to pass the thread first through the material, andthen to the line or edge alternately, so as to form a button-holestitch; but the lateral feed may be dispensed with and the stitch stillformed in a straight or curved line by the same interlocking of theneedle and shuttle threads. The needle in both cases has two motions oractions to one of the shuttle, as two loops are made by theneedle-thread before the shuttle need move to catch its loop, which isthe second one made.

What I claim as new, and desire to secure by Letters Patent, is-

A machine-made stitch formed by first making a loop in one thread andpassing a second loop of the same thread through the first loop, andthen passing a second thread through the second loop and drawing up theslack oi the threads and loops tightly in the cloth or other material asit is fed. along to receive the stitches, as set forth.

CHARLES PARHAM.

Witnesses:

DAVID BEISLER, CHAS. KOEHERSPERGE.

